Binuclear Metal Chelates of 1,2,5,6 Tetra Phyenyl-1,6-Dioxo- 3,4-Diazahexa-2,4-Diene-1,6-Dihydrazone with Ni(II). Co(II), Fe(II) and Cu(II)

K. Sahu*, and R.S. Thakur

Department of Chemistry B.R.B.College, Samastipur, India


A series of metal chelates of Ni(II), Cu(II), Co(II) and Fe(II) with the ligand 1,2,5,6-tetraphenyl-1 ,6-dioxo-3,4-diazahexa-2,4-diene-1,6-dihydrazone of the type Ni2L3X4, Ni2L2X4, Co2L2X4, Cu2L2X4 and FeL3X2 where X═Cl-, Br-, I-, SCN-, NO3, have been isolated, IR spectra indicate co-ordination of the ligand with the metal ions through azomethine nitrogen atoms and in binuclear complexes it spans two metal ions in a bi-bidentate manner. Electronic spectra and magnetic moment show approximately octahadral arrangement of ligands around metal ion with a distortion along the trigonal axis for the tris-complexes and along the tetragonal axis for bis-complexes.


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  • Asian J. Chem. /
  •  1992 /
  •  4(3) /
  •  pp 447-451